Coffee bean grinder

Abstract

The utility model provides a coffee bean grinder which comprises a shell, a main motor, an upper cutter head and a lower cutter head. The main motor is fixed to the inner side of the shell, a grinding cavity is formed in the inner side of the upper portion of the shell, the upper cutter head and the lower cutter head are arranged in the grinding cavity in an up-down corresponding mode, the upper cutter head is fixed to the inner top of the grinding cavity, and the lower cutter head is fixed to the upper end of a rotating shaft in the main motor. The coffee bean grinder further comprises a stepping motor, a pushing nut, a cushion block and a knob with a display screen. The stepping motor is fixed to the lower end of a machine shell in the main motor, the pushing nut is in threaded connection to the inner side of the lower end of the machine shell, the pushing nut and an output shaft of the stepping motor are in axial sliding connection and are limited in the circumferential direction, the cushion block is arranged between the lower end of the rotating shaft and the upper end of the pushing nut, and a reset structure is further arranged between the rotating shaft and the machine shell. According to the utility model, the distance between the lower cutter head and the upper cutter head can be conveniently adjusted, and the adjustment precision of the distance between the lower cutter head and the upper cutter head can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee bean grinding device technical field, specifically, relate to a coffee bean grinder. BACKGROUND

[0002] Coffee bean grinder is used for grinding coffee beans to form coffee powder, the current market coffee bean grinder includes casing, main motor, upper cutter and lower cutter, main motor is fixed in the inside of casing, the inside of casing upper portion is provided with grinding cavity, upper cutter and lower cutter are correspondingly set in grinding cavity, upper cutter is fixed with the inner top of grinding cavity, lower cutter is fixed with the upper end of the rotating shaft in main motor, in addition, coffee bean grinder still is provided with a lever structure, the horizontal rod in lever structure is in abutment with the lower end of the rotating shaft in main motor, through adjusting the position of horizontal rod in lever structure, can control the vertical position of rotating shaft in main motor relative to the shell in main motor, thereby can adjust the distance between upper cutter and lower cutter, after the distance between upper cutter and lower cutter is adjusted, can change the particle size of coffee powder produced after upper cutter and lower cutter grind coffee beans, however in the above structure, the position of rotating shaft in main motor relative to the shell in main motor is adjusted by lever structure, thereby there is the shortcoming of troublesome adjustment and low adjustment accuracy. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a coffee bean grinder, it can bring the convenience to the adjustment of the distance between lower cutter and upper cutter, and can improve the adjustment accuracy of the distance between lower cutter and upper cutter.

[0004] The utility model provides a coffee bean grinder, including coffee bean grinder, including casing, main motor, upper cutter and lower cutter, main motor is fixed in the inside of casing, the inside of casing upper portion is provided with grinding cavity, upper cutter and lower cutter are correspondingly set in grinding cavity, upper cutter is fixed with the inner top of grinding cavity, lower cutter is fixed with the upper end of the rotating shaft in main motor, coffee bean grinder still includes step motor, push nut, cushion block and knob with display screen, step motor is fixed in the lower end of the shell in main motor, push nut is screw connection in the inside of shell lower end, push nut and the output shaft of step motor axially sliding connection and circumferential location, cushion block sets up between the lower end of rotating shaft and the upper end of push nut, still be provided with reset structure between rotating shaft and shell, when step motor drives push nut to rotate to make push nut push cushion block and rotating shaft move upwards, the distance between lower cutter and upper cutter reduces, when step motor drives push nut to rotate to make push nut move downwards, reset structure is used to drive rotating shaft and cushion block to move down, and make the distance between lower cutter and upper cutter increase, step motor and knob all with controller in coffee bean grinder electric connection.

[0005] The utility model discloses through adopt above -mentioned structure, user can control the up and down movement of the push nut of step motor through the rotation knob, and can realize the electric adjustment of the vertical position of the rotation axis of main motor relative to the shell of main motor under the cooperation with reset structure, thereby can bring the convenience of the vertical position adjustment of the rotation axis relative to the shell, that is, can bring the convenience of the interval adjustment between lower cutter and upper cutter, and can improve the adjustment precision of the interval between lower cutter and upper cutter.

[0006] In a possible implementation, the upper end and the lower end of the rotation axis are rotatably connected to the shell of the main motor through the upper bearing and the lower bearing respectively, the inner side of the upper end of the shell is provided with an upper sliding cavity, the upper bearing is vertically slidably connected to the inner side of the upper sliding cavity, the inner side of the lower end of the shell is provided with a lower sliding cavity, the lower bearing is vertically slidably connected to the inner side of the lower sliding cavity, and the cushion block is arranged on the inner side of the lower sliding cavity, with the upper end of the cushion block abutting against the lower end of the outer ring of the lower bearing. After adopting this structure, the upper bearing is vertically slidably connected to the inner side of the upper sliding cavity, and the lower bearing is vertically slidably connected to the inner side of the lower sliding cavity, so that the rotation axis can be reliably vertically slidably connected to the shell, and when the cushion block moves upward, the cushion block can reliably push the lower bearing and the rotation axis to slide upward relative to the shell.

[0007] In a possible implementation, the edge of the upper end of the cushion block is provided with an annular boss, and the upper end of the annular boss abuts against the lower end of the outer ring of the lower bearing. After adopting this structure, when the cushion block slides upward relative to the lower sliding cavity, the annular boss can reliably push the lower bearing and the rotation axis to slide upward relative to the shell.

[0008] In a possible implementation, the upper end of the push nut is provided with an annular positioning table, the lower end surface of the cushion block is provided with an annular positioning groove, and the annular positioning table is inserted into the annular positioning groove and horizontally positioned in the annular positioning groove. After adopting this structure, the horizontal positioning of the cushion block and the push nut can be realized under the cooperation and positioning of the annular positioning table and the annular positioning groove, so that when the push nut pushes the cushion block upward, the cushion block can not move horizontally relative to the push nut, that is, the push nut can reliably push the lower bearing and the rotation axis to slide upward relative to the shell.

[0009] In a possible implementation, the middle part of the pushing nut is provided with a shaft hole, and the output shaft of the stepping motor is movably inserted into the shaft hole and is circumferentially limited by the shaft hole; by using this structure, the pushing nut can be reliably connected with the output shaft of the stepping motor in the vertical sliding mode and the circumferential limiting purpose is achieved; in addition, the upper end of the output shaft of the stepping motor can be a square column structure, and the shaft hole in the middle part of the pushing nut is a square hole, so that the pushing nut can be connected with the output shaft of the stepping motor in the vertical sliding mode and the circumferential limiting purpose is achieved; alternatively, the cross section of the output shaft of the stepping motor can be a "D" shaped structure, and the shaft hole in the middle part of the pushing nut is also a "D" shaped structure matched with the output shaft of the stepping motor, so that the pushing nut can be connected with the output shaft of the stepping motor in the vertical sliding mode and the circumferential limiting purpose is achieved.

[0010] In a possible implementation, the reset structure includes an elastic washer, the upper end of the elastic washer is abutted against the inner top of the upper sliding cavity, and the lower end of the elastic washer is abutted against the upper end of the upper bearing; the elastic washer is used to apply a pushing force to the upper bearing to drive the upper bearing and the rotating shaft to move downward to reset; by using this structure, when the stepping motor drives the pushing nut to rotate to move the pushing nut downward, the elastic washer can drive the rotating shaft and the cushion block to move downward, and the distance between the lower cutter and the upper cutter is increased; the reset structure has the advantages of simple structure and low manufacturing cost; in addition, the elastic washer is a component currently available on the market, and thus will not be described here.

[0011] In a possible implementation, the stepping motor is provided with a plurality of fixed holes distributed in the circumferential direction, and the stepping motor is fixed to the lower end of the machine shell by screws threaded into the fixed holes and screwed with the machine shell; by using this structure, the stepping motor can be reliably fixed to the lower end of the machine shell of the main motor. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the sectional structure of the utility model;

[0014] Figure 3 It is Figure 2 It is a schematic diagram of the structure of the enlarged middle A;

[0015] Figure 4 It is Figure 2 It is a schematic diagram of the structure of the enlarged middle B;

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model after removing part of the shell. DETAILED DESCRIPTION

[0017] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0018] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0019] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0020] The present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Reference Figures 1-5As shown, the embodiment of the present application discloses a coffee bean grinder, which comprises a shell 1, a main motor 2, an upper cutter disc 3 and a lower cutter disc 4; the main motor 2 is fixed on the inner side of the shell 1, the inner side of the upper part of the shell 1 is provided with a grinding cavity 11, the upper cutter disc 3 and the lower cutter disc 4 are arranged in the grinding cavity 11 in a top-to-bottom correspondence, the upper cutter disc 3 is fixed with the inner top of the grinding cavity 11, and the lower cutter disc 4 is fixed with the upper end of the rotating shaft 21 in the main motor 2; the coffee bean grinder further comprises a stepping motor 5, a push nut 6, a cushion block 7 and a knob 8 with a display screen; the stepping motor 5 is fixed on the lower end of the machine shell 22 in the main motor 2, the push nut 6 is threadedly connected on the inner side of the lower end of the machine shell 22, the push nut 6 is axially slidably connected with the output shaft of the stepping motor 5 and is circumferentially limited, the cushion block 7 is arranged between the lower end of the rotating shaft 21 and the upper end of the push nut 6, and a reset structure is further arranged between the rotating shaft 21 and the machine shell 22; when the stepping motor 5 drives the push nut 6 to rotate so as to push the cushion block 7 and the rotating shaft 21 to move upward, the distance between the lower cutter disc 4 and the upper cutter disc 3 is reduced; when the stepping motor 5 drives the push nut 6 to rotate so as to move the push nut 6 downward, the reset structure is used to drive the rotating shaft 21 and the cushion block 7 to move downward, and the distance between the lower cutter disc 4 and the upper cutter disc 3 is increased; the stepping motor 5 and the knob 8 are electrically connected with the controller in the coffee bean grinder; the knob with the display screen is an existing component on the market, and thus will not be described here.

[0022] The upper end and the lower end of the rotating shaft 21 are rotatably connected with the machine shell 22 of the main motor 2 through the upper bearing 23 and the lower bearing 24 respectively, the inner side of the upper end of the machine shell 22 is provided with an upper sliding cavity 221, the upper bearing 23 is vertically slidably connected on the inner side of the upper sliding cavity 221, the inner side of the lower end of the machine shell 22 is provided with a lower sliding cavity 222, the lower bearing 24 is vertically slidably connected on the inner side of the lower sliding cavity 222, the cushion block 7 is arranged on the inner side of the lower sliding cavity 222, and the upper end of the cushion block 7 abuts against the lower end of the outer ring of the lower bearing 24; after adopting this structure, since the upper bearing is vertically slidably connected on the inner side of the upper sliding cavity and the lower bearing is vertically slidably connected on the inner side of the lower sliding cavity, the rotating shaft can be reliably vertically slidably connected with the machine shell together, and since the cushion block is arranged on the inner side of the lower sliding cavity and the upper end of the cushion block abuts against the lower end of the outer ring of the lower bearing, when the cushion block moves upward, the cushion block can reliably push the lower bearing and the rotating shaft to slide upward relative to the machine shell.

[0023] The edge of the upper end of the cushion block 7 is provided with an annular boss 71, and the upper end of the annular boss 71 abuts against the lower end of the outer ring of the lower bearing 24; after adopting this structure, when the cushion block slides upward relative to the lower sliding cavity, under the action of the annular boss, the lower bearing and the rotating shaft can be reliably pushed to slide upward relative to the machine shell.

[0024] The upper end of the pushing nut 6 is provided with an annular positioning table 61, and the lower end surface of the cushion block 7 is provided with an annular positioning groove 72, the annular positioning table 61 is inserted into the annular positioning groove 72 and is horizontally positioned with the annular positioning groove 72; after adopting this structure, the horizontal positioning of the cushion block and the pushing nut can be realized under the cooperation and positioning of the annular positioning table and the annular positioning groove, so that when the pushing nut pushes the cushion block upwards, the horizontal movement of the cushion block relative to the pushing nut can be avoided, that is, the pushing nut can reliably push the lower bearing and the rotating shaft upwards relative to the shell.

[0025] The middle part of the pushing nut 6 is provided with a shaft hole 62, and the output shaft of the stepping motor 5 is movably inserted into the shaft hole 62 and is circumferentially limited with the shaft hole 62; after adopting this structure, the pushing nut can be reliably and vertically slidably connected with the output shaft of the stepping motor and achieve the purpose of circumferential limitation, in addition, the upper end of the output shaft of the stepping motor can be a square column structure, and the shaft hole in the middle part of the pushing nut is a square hole, so that the pushing nut and the output shaft of the stepping motor can be vertically slidably connected and achieve the purpose of circumferential limitation, or the cross section of the output shaft of the stepping motor can be a "D" shaped structure, and the shaft hole in the middle part of the pushing nut is also a "D" shaped structure matched with the output shaft of the stepping motor, so that the pushing nut and the output shaft of the stepping motor can be vertically slidably connected and achieve the purpose of circumferential limitation.

[0026] The reset structure includes an elastic washer 9, the upper end of the elastic washer 9 abuts against the inner top of the upper sliding cavity 221, and the lower end of the elastic washer 9 abuts against the upper end of the upper bearing 23; the elastic washer 9 is used to exert a pushing force on the upper bearing 23 to drive the upper bearing 23 and the rotating shaft 21 to move downward for reset; after adopting this structure, when the stepping motor drives the pushing nut to rotate to move the pushing nut downward, the elastic washer can drive the rotating shaft and the cushion block to move downward, and the distance between the lower cutter and the upper cutter is increased, the reset structure has the advantages of simple structure and low manufacturing cost, in addition, the elastic washer is a existing component on the market, so it is not described here.

[0027] A plurality of fixed holes 51 are circumferentially spaced on the stepping motor 5, and the stepping motor 5 is fixed to the lower end of the shell 22 by screws threaded into the fixed holes 51 and screwed with the shell 22; after adopting this structure, the stepping motor can be reliably fixed to the lower end of the shell of the main motor.

[0028] When the knob is rotated to one side to make the controller control the stepping motor to drive the pushing nut to move upward, the pushing nut can push the pad and the rotating shaft to move upward, at this time, the distance between the lower cutter disc and the upper cutter disc can be reduced, that is, the particle size of the coffee powder after the coffee beans are ground by the upper cutter disc and the lower cutter disc can be reduced; when the knob is rotated to the other side to make the controller control the stepping motor to drive the pushing nut to move downward, under the action of the reset structure, the reset structure can drive the rotating shaft and the pad to move downward, at this time, the distance between the lower cutter disc and the upper cutter disc can be increased, so that the particle size of the coffee powder after the coffee beans are ground by the upper cutter disc and the lower cutter disc can be increased; in addition, the display screen located at the upper end of the knob can display the particle size value of the coffee powder after adjustment or setting, so that the use of the user can be convenient, and the particle size of the coffee powder after the coffee beans are ground by the upper cutter disc and the lower cutter disc can be matched with the particle size value displayed by the display screen at the upper end of the knob.

[0029] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coffee bean grinder, comprising a shell (1), a main motor (2), an upper cutter disc (3) and a lower cutter disc (4); the main motor (2) is fixed on the inner side of the shell (1), the inner side of the upper part of the shell (1) is provided with a grinding cavity (11), the upper cutter disc (3) and the lower cutter disc (4) are arranged in the grinding cavity (11) in a corresponding upper and lower manner, the upper cutter disc (3) is fixed with the inner top of the grinding cavity (11), and the lower cutter disc (4) is fixed with the upper end of a rotating shaft (21) in the main motor (2); characterized in that: The coffee bean grinder further comprises a stepping motor (5), a push nut (6), a cushion block (7) and a knob (8) with a display screen; the stepping motor (5) is fixed at the lower end of the shell (22) in the main motor (2), the push nut (6) is threadedly connected to the inner side of the lower end of the shell (22), the push nut (6) is axially slidably connected with the output shaft of the stepping motor (5) and is circumferentially limited, the cushion block (7) is arranged between the lower end of the rotating shaft (21) and the upper end of the push nut (6), and a reset structure is further arranged between the rotating shaft (21) and the shell (22); when the stepping motor (5) drives the push nut (6) to rotate to make the push nut (6) push the cushion block (7) and the rotating shaft (21) to move upward, the distance between the lower blade disc (4) and the upper blade disc (3) is reduced; when the stepping motor (5) drives the push nut (6) to rotate to make the push nut (6) move downward, the reset structure is used to drive the rotating shaft (21) and the cushion block (7) to move downward, and the distance between the lower blade disc (4) and the upper blade disc (3) is increased; the stepping motor (5) and the knob (8) are electrically connected with the controller in the coffee bean grinder.

2. Coffee bean grinder according to claim 1, characterized in that The upper end and the lower end of the rotating shaft (21) are rotatably connected with the shell (22) of the main motor (2) through an upper bearing (23) and a lower bearing (24), respectively, the inner side of the upper end of the shell (22) is provided with an upper sliding cavity (221), the upper bearing (23) is vertically slidably connected to the inner side of the upper sliding cavity (221), the inner side of the lower end of the shell (22) is provided with a lower sliding cavity (222), the lower bearing (24) is vertically slidably connected to the inner side of the lower sliding cavity (222), the cushion block (7) is arranged in the inner side of the lower sliding cavity (222), and the upper end of the cushion block (7) abuts against the lower end of the outer ring of the lower bearing (24).

3. Coffee bean grinder as claimed in claim 2, characterized in that: An annular boss (71) is arranged at the edge of the upper end of the cushion block (7), and the upper end of the annular boss (71) abuts against the lower end of the outer ring of the lower bearing (24).

4. Coffee bean grinder according to any of claims 1-3, characterized in that: An annular positioning table (61) is arranged at the upper end of the push nut (6), an annular positioning groove (72) is arranged on the lower end surface of the cushion block (7), and the annular positioning table (61) is inserted into the annular positioning groove (72) and is horizontally limited by the annular positioning groove (72).

5. Coffee bean grinder as claimed in claim 4, characterized in that: A shaft hole (62) is arranged in the middle of the push nut (6), and the output shaft of the stepping motor (5) is movably inserted into the shaft hole (62) and is circumferentially limited by the shaft hole (62).

6. Coffee bean grinder according to claim 2 or 3, characterized in that: The reset structure comprises an elastic washer (9), the upper end of the elastic washer (9) abuts against the inner top of the upper sliding cavity (221), and the lower end of the elastic washer (9) abuts against the upper end of the upper bearing (23); the elastic washer (9) is used to exert a pushing force on the upper bearing (23) to drive the upper bearing (23) and the rotating shaft (21) to move downward and reset.

7. The coffee bean grinder of claim 1, wherein: The stepping motor (5) is provided with a plurality of fixed holes (51) distributed in a circumferential direction, and the stepping motor (5) is fixed to the lower end of the machine shell (22) through screws threaded into the fixed holes (51) and screwed with the machine shell (22).

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